/* ============================================================
   Walkway Gravel Calculator — Page Styles
   walkway-gravel-calculator.css
   Green #16A34A theme — follows design system
   ============================================================ */

/* ── Hero Section ─────────────────────────────────────────── */
.wwc-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem 3rem;
}
.wwc-hero-copy { max-width: 560px; }
.wwc-hero-copy .hero-badge {
  display: inline-block;
  background: var(--ds-primary-light);
  color: var(--ds-primary);
  font-size: var(--ds-text-sm);
  font-weight: 600;
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1rem;
  letter-spacing: 0.01em;
}
.wwc-hero-copy h1 { font-size: var(--ds-text-5xl); font-weight: 800; line-height: 1.15; color: var(--ds-text); margin: 0 0 1rem; }
.wwc-hero-copy h1 span { color: var(--ds-primary); }
.wwc-hero-copy .hero-subtitle { font-size: var(--ds-text-lg); color: var(--ds-text-secondary); line-height: 1.6; margin: 0 0 1.5rem; }
.wwc-hero-copy .hero-cta {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--ds-primary); color: #fff; font-weight: 600; font-size: var(--ds-text-base);
  padding: 0.8rem 1.75rem; border-radius: 8px; text-decoration: none; transition: background .2s;
}
.wwc-hero-copy .hero-cta:hover { background: var(--ds-primary-hover); }

.wwc-hero-visual { display: flex; justify-content: center; align-items: center; }
.wwc-hero-visual svg { max-width: 100%; height: auto; }

/* ── Calculator Section ───────────────────────────────────── */
.wwc-calc-section {
  max-width: 1200px; margin: 0 auto; padding: 2rem 2rem 4rem;
}
.wwc-calc-section-title {
  font-size: var(--ds-text-3xl); font-weight: 700; color: var(--ds-text);
  text-align: center; margin: 0 0 2rem;
}

.wwc-calc-card {
  background: var(--ds-card); border: 1px solid var(--ds-border);
  border-radius: 16px; padding: 2rem; box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.wwc-calc-card-title {
  font-size: var(--ds-text-xl); font-weight: 700; color: var(--ds-text);
  margin: 0 0 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--ds-border-light);
}

/* Input grid */
.wwc-input-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem;
}
.wwc-input-grid.col-3 { grid-template-columns: 1fr 1fr 1fr; }
.wwc-input-grid.col-2 { grid-template-columns: 1fr 1fr; }
.wwc-input-grid.col-1 { grid-template-columns: 1fr; }

/* Form group */
.wwc-field { display: flex; flex-direction: column; gap: 0.35rem; }
.wwc-field label {
  font-size: var(--ds-text-sm); font-weight: 600; color: var(--ds-text-secondary);
}
.wwc-field select,
.wwc-field input[type="number"],
.wwc-field input[type="text"] {
  padding: 0.65rem 0.85rem; border: 1.5px solid var(--ds-border); border-radius: 8px;
  font-size: var(--ds-text-base); font-family: var(--ds-font); color: var(--ds-text);
  background: var(--ds-card); transition: border-color .2s;
  -moz-appearance: textfield;
}
.wwc-field select:focus,
.wwc-field input:focus { outline: none; border-color: var(--ds-primary); box-shadow: 0 0 0 3px var(--ds-primary-light); }
.wwc-field select { cursor: pointer; }

.wwc-unit-toggle {
  display: flex; border-radius: 8px; overflow: hidden; border: 1.5px solid var(--ds-border);
}
.wwc-unit-toggle button {
  flex: 1; padding: 0.55rem 0.75rem; border: none; background: var(--ds-card);
  font-size: var(--ds-text-sm); font-weight: 500; color: var(--ds-text-secondary);
  cursor: pointer; transition: all .2s; font-family: var(--ds-font);
}
.wwc-unit-toggle button:first-child { border-right: 1.5px solid var(--ds-border); }
.wwc-unit-toggle button.active {
  background: var(--ds-primary); color: #fff; font-weight: 600;
}

/* Shape tabs */
.wwc-shape-tabs {
  display: flex; gap: 0.5rem; margin-bottom: 1.25rem; flex-wrap: wrap;
}
.wwc-shape-tabs button {
  padding: 0.55rem 1.25rem; border: 1.5px solid var(--ds-border); border-radius: 8px;
  background: var(--ds-card); font-size: var(--ds-text-sm); font-weight: 500;
  color: var(--ds-text-secondary); cursor: pointer; transition: all .2s;
  font-family: var(--ds-font);
}
.wwc-shape-tabs button.active {
  background: var(--ds-primary); color: #fff; border-color: var(--ds-primary); font-weight: 600;
}
.wwc-shape-tabs button:hover:not(.active) { border-color: var(--ds-primary); color: var(--ds-primary); }

/* Bag size selector */
.wwc-bag-selector {
  display: flex; gap: 0.75rem; flex-wrap: wrap;
}
.wwc-bag-option {
  display: flex; flex-direction: column; align-items: center; gap: 0.35rem;
  padding: 0.75rem 0.9rem; border: 2px solid var(--ds-border); border-radius: 10px;
  cursor: pointer; transition: all .2s; background: var(--ds-card); min-width: 80px;
}
.wwc-bag-option:hover { border-color: var(--ds-primary); }
.wwc-bag-option.active {
  border-color: var(--ds-primary); background: var(--ds-primary-light);
}
.wwc-bag-option .bag-weight { font-size: var(--ds-text-base); font-weight: 700; color: var(--ds-text); }
.wwc-bag-option .bag-label { font-size: var(--ds-text-xs); color: var(--ds-text-muted); }
.wwc-bag-option.active .bag-weight { color: var(--ds-primary); }
.wwc-bag-option.active .bag-label { color: var(--ds-primary); }

/* ── Results Dashboard ────────────────────────────────────── */
.wwc-results {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem;
  margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--ds-border-light);
}
.wwc-result-card {
  background: var(--ds-primary-bg); border: 1px solid var(--ds-primary-light);
  border-radius: 12px; padding: 1.5rem 1.25rem; text-align: center;
}
.wwc-result-card .result-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }
.wwc-result-card .result-value {
  font-size: var(--ds-text-3xl); font-weight: 800; color: var(--ds-primary); line-height: 1.2;
}
.wwc-result-card .result-label {
  font-size: var(--ds-text-sm); color: var(--ds-text-secondary); margin-top: 0.25rem;
}

/* ── Content Sections ─────────────────────────────────────── */
.wwc-content {
  max-width: 1200px; margin: 0 auto; padding: 2rem 2rem 4rem;
}
.wwc-content h2 {
  font-size: var(--ds-text-3xl); font-weight: 700; color: var(--ds-text);
  margin: 0 0 1rem;
}
.wwc-content h3 { font-size: var(--ds-text-xl); font-weight: 600; color: var(--ds-text); margin: 0 0 0.75rem; }
.wwc-content h4 { font-size: var(--ds-text-base); font-weight: 600; color: var(--ds-text); margin: 0 0 0.5rem; }
.wwc-content p { font-size: var(--ds-text-base); color: var(--ds-text-secondary); line-height: 1.7; margin: 0 0 1rem; }

/* Tables */
.wwc-table {
  width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: var(--ds-text-base);
  background: var(--ds-card); border-radius: 10px; overflow: hidden;
  border: 1px solid var(--ds-border);
}
.wwc-table thead { background: var(--ds-primary-bg); }
.wwc-table th {
  padding: 0.85rem 1.25rem; text-align: left; font-weight: 600;
  color: var(--ds-primary); font-size: var(--ds-text-sm);
}
.wwc-table td {
  padding: 0.75rem 1.25rem; border-top: 1px solid var(--ds-border-light);
  color: var(--ds-text-secondary);
}
.wwc-table tbody tr:hover { background: var(--ds-primary-bg); }

/* Material recommendation cards */
.wwc-material-cards {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; margin: 1.5rem 0;
}
.wwc-material-card {
  background: var(--ds-card); border: 1px solid var(--ds-border);
  border-radius: 12px; padding: 1.5rem; transition: transform .2s,box-shadow .2s;
}
.wwc-material-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,.08); }
.wwc-material-card .mat-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.wwc-material-card .mat-name { font-size: var(--ds-text-base); font-weight: 700; color: var(--ds-text); margin-bottom: 0.35rem; }
.wwc-material-card .mat-depth { font-size: var(--ds-text-sm); color: var(--ds-primary); font-weight: 500; margin-bottom: 0.35rem; }
.wwc-material-card .mat-best { font-size: var(--ds-text-xs); color: var(--ds-text-muted); }

/* Best gravel cards */
.wwc-gravel-cards {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin: 1.5rem 0;
}
.wwc-gravel-card {
  background: var(--ds-card); border: 1px solid var(--ds-border);
  border-radius: 12px; padding: 1.5rem; transition: transform .2s,box-shadow .2s;
}
.wwc-gravel-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,.08); }
.wwc-gravel-card .gv-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.wwc-gravel-card .gv-name { font-size: var(--ds-text-base); font-weight: 700; color: var(--ds-text); margin-bottom: 0.75rem; }
.wwc-gravel-card .gv-pros { font-size: var(--ds-text-sm); color: var(--ds-primary); line-height: 1.5; margin-bottom: 0.5rem; }
.wwc-gravel-card .gv-cons { font-size: var(--ds-text-sm); color: var(--ds-warning); line-height: 1.5; }
.wwc-gravel-card .gv-best { font-size: var(--ds-text-xs); color: var(--ds-text-muted); margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--ds-border-light); }

/* Design examples */
.wwc-examples {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin: 1.5rem 0;
}
.wwc-example-card {
  background: var(--ds-card); border: 1px solid var(--ds-border);
  border-radius: 12px; padding: 1.5rem;
}
.wwc-example-card .ex-title { font-size: var(--ds-text-base); font-weight: 700; color: var(--ds-text); margin-bottom: 0.75rem; }
.wwc-example-card .ex-detail { font-size: var(--ds-text-sm); color: var(--ds-text-secondary); line-height: 1.6; }
.wwc-example-card .ex-result {
  margin-top: 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--ds-border-light);
  font-size: var(--ds-text-base); font-weight: 700; color: var(--ds-primary);
}

/* Steps */
.wwc-steps { margin: 1.5rem 0; }
.wwc-step {
  display: flex; gap: 1rem; align-items: flex-start; padding: 1rem 0;
  border-bottom: 1px solid var(--ds-border-light);
}
.wwc-step:last-child { border-bottom: none; }
.wwc-step-num {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  background: var(--ds-primary); color: #fff; font-weight: 700; border-radius: 50%; flex-shrink: 0;
  font-size: var(--ds-text-sm);
}
.wwc-step-body h4 { margin: 0 0 0.25rem; font-size: var(--ds-text-base); font-weight: 600; color: var(--ds-text); }
.wwc-step-body p { margin: 0; font-size: var(--ds-text-sm); color: var(--ds-text-secondary); }

/* Formula Box */
.wwc-formula-box {
  background: var(--ds-bg); border: 1.5px solid var(--ds-primary-light); border-radius: 10px;
  padding: 1.25rem 1.5rem; margin: 1.25rem 0; text-align: center;
}
.wwc-formula-box .formula-text {
  font-size: var(--ds-text-lg); font-weight: 700; color: var(--ds-primary); font-family: monospace;
}

/* Info callout */
.wwc-callout {
  padding: 1.25rem; background: var(--ds-bg); border-radius: 10px;
  border-left: 4px solid var(--ds-primary); margin: 1.25rem 0;
  font-size: var(--ds-text-sm); color: var(--ds-text-secondary); line-height: 1.6;
}
.wwc-callout strong { color: var(--ds-text); }

/* Internal Links */
.wwc-internal-links {
  display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.5rem 0;
}
.wwc-internal-link {
  display: inline-block; padding: 0.6rem 1.25rem;
  background: var(--ds-primary-bg); border: 1px solid var(--ds-primary-light);
  border-radius: 8px; color: var(--ds-primary); font-weight: 500;
  font-size: var(--ds-text-sm); text-decoration: none;
  transition: background .2s;
}
.wwc-internal-link:hover { background: var(--ds-primary-light); }

/* ── FAQ ──────────────────────────────────────────────────── */
.wwc-faq { margin: 2rem 0; }
.wwc-faq-item { border: 1px solid var(--ds-border); border-radius: 10px; margin-bottom: 0.75rem; overflow: hidden; }
.wwc-faq-q {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 1.1rem 1.25rem; background: var(--ds-card); border: none; cursor: pointer;
  font-size: var(--ds-text-base); font-weight: 600; color: var(--ds-text);
  text-align: left; font-family: var(--ds-font); gap: 1rem;
}
.wwc-faq-q:hover { background: var(--ds-primary-bg); }
.wwc-faq-q .faq-icon { font-size: 1.2rem; color: var(--ds-primary); transition: transform .3s; }
.wwc-faq-item.open .wwc-faq-q .faq-icon { transform: rotate(45deg); }
.wwc-faq-a { padding: 0 1.25rem; max-height: 0; overflow: hidden; transition: all .3s; }
.wwc-faq-item.open .wwc-faq-a { max-height: 500px; padding-bottom: 1.1rem; }
.wwc-faq-a p { font-size: var(--ds-text-base); color: var(--ds-text-secondary); line-height: 1.7; margin: 0; }

/* Breadcrumbs */
.breadcrumbs {
  padding: 1rem 2rem; max-width: 1200px; margin: 0 auto;
  font-size: var(--ds-text-sm); color: var(--ds-text-muted);
}
.breadcrumbs a { color: var(--ds-text-secondary); text-decoration: none; }
.breadcrumbs a:hover { color: var(--ds-primary); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .wwc-hero { grid-template-columns: 1fr; text-align: center; padding: 3rem 1.5rem 2rem; }
  .wwc-hero-copy { max-width: 100%; }
  .wwc-hero-visual { display: none; }
  .wwc-input-grid { grid-template-columns: 1fr; }
  .wwc-input-grid.col-3 { grid-template-columns: 1fr 1fr; }
  .wwc-results { grid-template-columns: 1fr 1fr; }
  .wwc-material-cards { grid-template-columns: 1fr 1fr; }
  .wwc-gravel-cards { grid-template-columns: 1fr; }
  .wwc-examples { grid-template-columns: 1fr; }
}
@media (max-width: 540px) {
  .wwc-hero { padding: 2rem 1rem 1.5rem; }
  .wwc-hero-copy h1 { font-size: var(--ds-text-3xl); }
  .wwc-calc-section { padding: 1rem 1rem 2rem; }
  .wwc-results { grid-template-columns: 1fr; }
  .wwc-material-cards { grid-template-columns: 1fr; }
  .wwc-input-grid.col-3 { grid-template-columns: 1fr; }
  .wwc-table { font-size: var(--ds-text-sm); }
  .wwc-table th, .wwc-table td { padding: 0.6rem 0.75rem; }
}